Malicious PDF — malware analysis report

Static analysis result for SHA-256 737c785f4901c3fa…

MALICIOUS

PDF

73.5 KB Created: 2021-04-09 14:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1fbd3a197b416b49f1534bd71fcd1a4a SHA-1: 063e1a7c2e3244db58789389d44ab0adb6c2d1fd SHA-256: 737c785f4901c3facfac83bdc2c94de6bde652b2a8a82cce87703eff98ce24b6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The embedded URL 'https://botokaw.ru/strik?utm_term=moon+river+chords+capo' is a primary indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/strik?utm_term=moon+river+chords+capo PDF link annotation
    • http://reduslim-ufficiale.website/nuwulokc51m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_605c001ea4fee.pdfIn PDF document text
    • http://ubsvp.com/wuvaxqfkc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471985/normal_601e540a99e07.pdfIn PDF document text
    • http://nuwevabufa.mypressonline.com/airline_prefix_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469641/normal_60189f3e45f1f.pdfIn PDF document text
    • http://euromarket.pro/red_book_coinsckrf6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c76203b-6de9-4ac4-9822-29fb9e1df80d/presto_dehydro_digital_food_dehydrator.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/65039579136.pdfIn PDF document text
    • http://mudefikireneb.rf.gd/kidimisek.pdfIn PDF document text
    • http://pikezega.epizy.com/family_meeting_agenda.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/midatene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed5cb6b-4e64-4921-b456-231aa56e86b2/skyrim_power_level_alchemy.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/caracteristicas_de_algoritmos_cuantitativos.pdfIn PDF document text
    • http://fidegaf.atwebpages.com/marketing_segmentation_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/jeep_cherokee_issues_2016.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 5196 bytes
SHA-256: 34693e3b0d29b56ad2ad6f1c86b243f7467d919343da770c67045a299bac1be9
font_01_sfnt_off0000f0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DD 11444 bytes
SHA-256: 8b57e5b3ab756be350d97f0ad84612a9b4ea2c1355a7b03e0a3f993728c7010d

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